In NAT, which action changes the destination IP address of a packet?

In NAT, which action changes the destination IP address of a packet?

• A. SNAT
• B. Port Forwarding
• C. DNAT
• D. NAT66

Answer: (C)

Destination NAT, or DNAT, is the action that rewrites the destination IP address of a packet. In NAT, you can modify where a packet is headed, and DNAT does exactly that by changing the destination IP (and often the destination port) to route the traffic to a specific internal server. This is how inbound requests to a public IP can be directed to a chosen internal host—it's the mechanism behind port forwarding as well. By contrast, SNAT changes the source IP for outbound traffic, and NAT66 applies NAT to IPv6 in a similar way. So the operation that changes where the packet is going by altering the destination IP is DNAT.

Destination NAT, or DNAT, is the action that rewrites the destination IP address of a packet. In NAT, you can modify where a packet is headed, and DNAT does exactly that by changing the destination IP (and often the destination port) to route the traffic to a specific internal server. This is how inbound requests to a public IP can be directed to a chosen internal host—it's the mechanism behind port forwarding as well. By contrast, SNAT changes the source IP for outbound traffic, and NAT66 applies NAT to IPv6 in a similar way. So the operation that changes where the packet is going by altering the destination IP is DNAT.